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UNITED sTATEs PATENT oEEroE.

M. G. HUBBARD, OF NEW YORK, N. Y.

METHOD OF HANGING PLANE-STOCKS AND THEIR MOUTI-IPIECES.

Specification of Letters Patent No. 13,174, dated July 3, 1855.

To all whom t may concern Be it lmown that I, M. G. HUBBARD, of the city, county, and State of New York, have invented certain new and useful Improvements in Planing-Machines for Planing Planks, &c.; and I do hereby declare the following to be a full, clear, and eXact description thereo-f, reference being had to the accompanying drawing, in which* Figure l, is a side elevation. Fig. 2,.is a top plan. j

The nature of my improvements consists inthe mode of hanging the lioating knife, and in the mode of construction o-f the mouth pieces and planes, and their connection with each other, and the bed plate or frame to which they are jointed, by which arrangement the mouth piece is made to press upon the plank with a force regulated by the resist-ance of the cut and the whole can be turned up out of line, and sharpened, without removing, while the machine is in operation, and brought into action again without stopping.

The construction is as follows The bed and frame are like ordinary stationary planes; from the sides two projections (a.\l stand up for each plane stock, one on cach side; to these projections. or other fixtures firmly connected with the bed frame, the bar or mouth-piece (6) is jointed; this mouthpiece is made straight across the bed, and at each end an arm (6) extends backward, on each side. the rear end of which is connected by a pinion or pivot (0,) to the projection (a), before named, so as to allow the bar (6,) to be thrown back into the position shown by the red lines in Fig. l; below the pivot (0,) the plane stock (79) is jointed to the arms (6,) of the bar (6,) at the point (4%); this plane stock is in sha-pe like an ordinary stationary plane stock, but it has at each side bearings, which rest on the bed plate, as shown at (r, 73) Fig. 3, that elevate the plane sufciently above the bed for the thickness of the 'stuff to be planed. Thus constructed, the action is as follows YVhen a plank strikes the edge of the plane, as it is forced forward by the usual feed machinery, it bears it backward, and this action, as it will at once be seen by the relative position of the pivots (0,) and (17%,) bring down the bar (6,) upon the plank. with a force commensurate with the action of the knife, and the plank is thus held down properly for the action of planing, while no unnecessary friction is made upon the board; for if either of the knives of the series fail to take a shaving all the pressure of the bar is relieved; and if a light shaving is taken light pressure is produced, while the greatest resistance is fully provided for.V

If during the action of planing any one of the knives becomes dull, it need not be removed from the plane, but the bar and plane stock are easily turned back, as shown, by the red lines in Fig. l, and the knife is sharpened, and they are then both returned to their place again; this can be done even while the plane is in action, to a certain eX- tent. The advantage of the regulated pressure is, that the planes will clear themselves from the clogging fiber, so great an obst-acle in stationary planes, especially when the sharp edge is taken off the knives; .and as the labor of keeping the knives in order is so much reduced by being able to sharpen them while in the machine, a greater amount of work can be done with a saving of time and power, than in the ordinary machines.

In my improved machine I afliX my floating plane stock (f,) by bolts to the ends of two long arms or springs (6,) this lioating knife, which removes the first shaving from the board, is so set as to remove a thin cut from the surface, following all the inequalities thereof, by which all the grit is cleared from before the knives. I find this the most perfect way of hanging the knives for the first cut and is more perfect than the mode for which I have recently taken Letters Patent.

Having thus fully described my improvements in planes, and the hingingthe same7 what I claim therein as new, and for which I desire to secure Letters Patent, is-

l. The construction and attachment of the plane-stock and pressure bar (6,) to the bed-frame of the planing machine, by which the pressure of the bar is regulated, and the bar and plane-stock can be turned back to sharpen the plane.

2. I also claim jointing the floating or front plane to springs or bars, and turning on a pivot to rise and fall, as above set forth, over the inequalities of the board, as above specified.

M. Gr. HUBBARD.

Witnesses:

JOHN S. GARE, JACOB HITzEL. 

